Light Intensity of a Quartz Mercury Lamp


    DR. TSUNESABURO ASADA, of the Shiomi Institute of Physical and Chemical Research, Osaka, Japan, has sent us an interesting communication describing measurements he has made on the intensity of the light emitted by a quartz mercury lamp. The instantaneous values of the light intensity at several points of the luminous part of an alternating current quartz mercury lamp, the terminal voltage and the current were all measured by the help of an oscillograph. In carrying out the test, the image of the lamp was projected by means of a lens on to a screen.

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    Light Intensity of a Quartz Mercury Lamp. Nature 127, 254 (1931).

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